Automatic drilling machine



huge 17 9 92631 E. W. CLEVELAND AUTOMATIC DRILLING MACHINE '7 Sheets-Sheet 1 Filed July 29, 1920 /7 Men/Zr [dyar/WC/evekwd Aug. 17 1926. E. W. CLEVELAND AUTOMATIC DRILLING MACHINE '7 Sheets-Sheet 2 I Filed July 29.- 1920 r a Z 2, a a4 .wm W 5 0/6 a 6/ A w 0 c y i 3 w A 4/ 0% w i A 9 P O 0 E. W. CLEVELAND AUTOMATIC DRILLING MACHINE Aug. 17, was, 159 mm Filed July 29, 1920 v Sheets-Sheet s- //7Ve/7i0r fa yar' Wef/el/e/ana Aug. 17, 1926.

E. W. CLEVELAND AUTOMATIC DRILLING MACHINE '7 Sheets-Sheet 4 Filed July 29, 1920 Aug 17, 19%, 15%,718 E. W. CLEVELAND -AUTOMATIC DRILLING MACH INE Filed July 29, 1920 *7 Sheets-Sheet s magma Ange W 9 E9260 E. W. CLEVELAND AUTOMATIC DRILLING MACHINE Filed July 29, 1920 TStxeets-Sheet 6 mg 17 i926.

E. W. CLEVELAND AUTOMATIC DRILLING-MACHINE Filed July 29, 1920 '7 Sheets-Sheet 7 l lilll'lrlivl v g g $5M Patented Aug. 17, 1926.

UNITED STATES PATENT OFFICE.

EDGAR W. CLEVELAND, 0F HOLLAND, MICHIGAN.

AUTOMATIC DRILLING MACHINE.

Application filed July 29, 1920.

This invention relates to multiple spindle drills, being particularly concerned with a novel means for actuating the head which carries the plurality of drills up and down. toward or away from the workpositioned below the head. In practice the movement of the head in a downward direction serves to force the drills into the work and in an upward direction carries the drills away from the work. Of course on upward m'ovement the drills are carried a distance above the work for the introduction of a new piece of work below them. The feeding movement of the head in a downward direction is necessarily slow as drills can be fed into the work only at a comparatively slow speed. On the upward movement of the head, the speed does not have to be so slow, and until the drills are about to engage with the workon the-downward movement of the head such slow feeding speed is not necessary. Accordingly, it is a primary ob-' ject and purpose of the present invention to make a multiple spindle drilling machine with a drill carrying head mechanically driven downward at two different speeds, one of which is relatively fast, or for movement of the head to bring the drills substantially to the work, and the other of which is relatively slow, or for the movement of the head when the drills are engaged with the work, and for elevating the head after the drilling is accomplished at onerelatively fast speed. A further ob.-.

ject ofthe invention is to provide driving mechanism for accomplishing these different speed drives of the drill carrying head which may overlap in its operations, that is both the quick and slow speed downward drive for the head may be operating at the same time and the quick speed upward and slow speed downward operating at the same time, or any of the various speed drives named operated singly, this obviating any possible injury to the mechanism which might occur through faulty handling if sin-.

gle operation of any one of the driving speed mechanisms was obligatory. A still further object of the invention is to provide automatic means for stopping the quick downward traverse of the head at a predetermined point andeither at the, same -time or slightly before the throwing in of the slow feeding mechanism. -A still further object is to provide both manually controlled and automatic means for actuating both the Serial No. 899,852.

slow speed feed and the quick power traverse movements of-the head so that a full and complete control of such movements may be had. Many other objects and purposes, together with novel constructions and mechanisms for attaining the same will appear fully and in detail as understanding of the invention is had from the following description taken in connection with the accompanying drawings, in which Fig. 1 is a side elevation of the upper part of a multiple spindle drilling machine made in accordance with my invention.

Fig. 2 is a front elevation thereof, parts being broken away for disclosure of other parts of the structure.v

Fig. 3 is an enlarged fragmentary side elevation and section showing details of the slow-speed drive.

Fig. 4 is an enlarged section taken vertically through the upper end of themachine from front to rear.

Fig. 5 is a transverse verticalsectionjsubstantially on line 5 -5 of Fig. 4.

Fig. 6 is a partial plan and horizontal section through the mechanism shown in Fig. 5.

Fig. 7

on line 7'7 of Fig. 3.

Fig. 8 is a fragmentary horizontal sec tion on line 8-8 of Fig.3. i

Fig. 9 is a fragmentary elevation. and

associated with the section lines.

is a horizontal section substantially On the supporting post or column 1 ofthe machine mechanism is carried driven from a wheel 2 which may be belt driven by belt3 from any suitable'source, of power.

Wheel 2 is fixed on one end of. a horizontal shaft 4 extending through the upper end of the machine abovea bottom curved'plate 5 forming one side of an enclosing casing or housing for the mechanism. Abevelled gear 6 is secured to the opposite end of. shaft 4:, the same driving a siniilargear 7 secured on the lower end of a vertical shaft 8 rotatably mounted in bearings 9 carried by the housing. At its upper end shaft 8 has a pinion 10 secured thereto, it meshing with a gear 11 fixed to a vertically positioned sleeve 12 through which a shaft 13 passes, the same being splined on the shaft.

' The sleeve is rotatably mounted in bearings in as the same comprise no part-of the present invention, and their mounting is well known to all skilled inthe art.

The head is located in front of the column 1 and has rearwardly extending sides 16 provided with guide ways 17 at their rear edges in which guides 18 on the column are received, serving to guide the'head in its up and down movements.

A bevelled pinion 19 is secured to and ro tates with shaft 8, being in engagement with a similar pinion 20 secured at one end of a shaft 21 mounted horizontally in bearings 22 carried in the housing 15. The opposite end of the shaft carries'a bevelled gear 24 the same being in meshwith 'two bevelled gears 25 and 26, each having an extended sleeve rotatably mounted in bearings in the housin 15.' A shaft 27 passes loosely throu-g the sleeve of gear 26 and partly into the sleeve of gear 25. A short shaft 28 is received 'inthe opposite end of the sleeve of gear 25 and is keyed thereto, being provided at its opposite end with a bevelled pinion 29 meshing with-a similar pinion 30 through which a vertical shaft 31 passes, having splined connection with gear 30 to permit the slidable passage of the shaft through the gear. The shaft passes upwardly through a cover plate 32 which may be removed to gain access to the gears when necessary. It is apparent that the shaft 31 is continuously rotated in one directionv whenever the machine is being operated.

- ing the shaft 35 at different relative speed with. respect to shaft 27.

A-double clutch member 38 is splined on shaft 27 between gears 25 and 26 and is adapted to be moved to connect with either.

bearings carried by the head 16.

A yoke 38 connected with the clutch is fixed at its other end to a rod 39 slidably mounted in the housing 15 and having one end extendingthrough a side of the housing and pivotally connected to one end of a lever 40 which is pivotally mounted between its ends at 41 to a supporting cross bar 42 cast integral with the housing 15. The other end of lever 40 is connected by a link 43 with an arm 44 fixed at the upper end of a vertical rock shaft 45, the upper end of which is carried at the end of an outwardly projecting supporting arm 42 cast on housing 15. Rocking shaft 45 serves to move the clutch member 38 into engagement with either gear 25 or 26 so that the shaft 35is driven in either of two directions dependent upon which gear 25 or 26 is connected to shaft 27.

The worm 36 is in engagement with a worm wheel 46 secured at. the upper end of a vertical shaft 47 which ,extends down-' wardly in front of the column 1 and is ends is formed with an annular flange 49 between which and the upper'bearing 50 a thrust. bearing 51 is placed. A bevelled pinion 52 is placed around and keyed to the sleeve nut 49 and a thrust bearing 51 interposed between it and the lower bearing 50. At its lower end shaft 47 passes through a lug 53 projecting forward from the column 1 and upper and lower thrust bearings 54 are used'to mount said lower end of the shaft on said lug. It is obvious that shaft 47 may be driven in either direction and with such rotation, head 16 is either raised or lowered, sleeve nut 49 running up or down on the shaft and raising or loweringthe head. This is the quick' traverse drive for the head and with it the head ismoved at a relatively fast speed up or down with reference to the supporting column.

A bevelled pinion 55 at one end of a short horizontal shaft 56 is in mesh with the pinion 52, the shaft being mounted in suit-able A large worm gear 57 is keyed on shaft 56 in engagement with which is a worm 58 on a shaft 59 which passes through a side 16 on the head and through a long bearing in a housing 60 attached to and at one side of the head. At its. outer end the shaft carries a gear 61 in mesh with a gear 62 on the outer end of a short shaft 63 also mounted in housing 60. The gears 61 and 62 may be reached by opening cover 64 normally covering the same and the gears removed and replaced by two other gears of different gear ratio for change of feeds. At the inner end of shaft 63 a worm wheel 65 is secured,

, the same being in engagement with a worm 66 cut on-sleeve 67'through which the lower reduced end of shaft 31 passes, the sleeve being mounted .in suitable bearings 68 and the lower end of the shaft in bearings 69 as shown in Fig. 3. The upper end of sleeve 67 extends slightly above the housing and isformed with clutch teeth 70.

A collar 71 is splined on shaft 31 immediately above the upper. end of sleeve 67, said collar on its under facebeing formed with clutch teeth 72 adapted to engage with the teeth 70. A stop collar 73 is fixed on shaft 31 above collar 71 and limits the upward movement thereof. Yoke arms 74 extending forward from lever 75, pivotally mounted between its ends at 76 and carried by two upwardly extending brackets 476 east integral with the housing 60 engage the collar'71 and move it intoand out of engagement with the sleeve 67. At its upper end, lever 75 is forked and a second lever 77 pivotally mounted thereon, being normally positioned horizontal and having its front end supported by a spring 78 which is compressed slightly when the rear end of lever 77 strikes the member 83 during the rapid downward movement of the head, and at the instant of engagement of the slow drilling feed, as will later appear.

The lower end of lever 75 is equipped with a roller- 79- adapted to ride over a pointed spring actuated plunger 80 so'that the lever must go to either one or the other of its extreme positions and can not stop at any intermediate position. The plunger 80 is mounted on an integral extension to the housing 60 as shown. Below the pivot pin 76, lever 75 is formed with a downward and rearward extension 81.

Back of this lever a vertical supporting rod 82 is mounted on the column 1, serving as a support for two members 83 and 84 adjustably mounted thereon and fixed in any position to which adjusted by set screws. The front parts of said members are offset in different planes. At one end of the pivot nected or disconnected at will.

pin or shaft 76 an arm 85 is secured, de pendlng therefrom and having a laterally.

extending pin 86 passing through a slot 87 in lever 75, while .its lower end is pivotally' connected to the rear end of a link bar' 88,

the same extending forward alongside head 16 and having connection at its front end to the lower end of an arm 89 depending from one end ofa rod 90 mounted horizontally and rotatably across the front side of the head 16. A similar rod 90 is located in front. of rod 90 being connected'thereto by arms '91 whereby on manual operation of rod 90 from any point at the front of the machine, collar 71 and sleeve 67 may be con- Rock shaft 45 passes downwardly between the sides of head 16and the rearward extension 60 of the housing 60 andat its lower end through a sleeve 92 splined thereon and held between upper and lower lugs 93 which are connected to and move with the head 16. An arm 94 extends rearwardly from sleeve 92, being formed at its rear end with a member having inclined upper and lower faces as shown at 95 in Fig. 9. Two operating members 96 and 97 are adjustably mounted one above'the other on a side of the column, securing bolts passing through the same and being received in a T-slot 98 which is cut vertically in the column whereby the members may be readily adjusted to any desired position,

An arm 99 extends outwardly from sleeve 92 to which the rear end of a link bar 100 is secured, the same extending longitudinally and horizontally alongside the head 16 and having connection with one arm 101 of a bell-crank lever pivotally mounted on and at the front of the head. The other arm (if the bell-crank lever extends forward and is formed into a handle 102 which may be grasped for manual operation.

The following is the practical operation of the construction described: Shaft 47 may be driven in either direction and with the d uble clutch member 38 in central position it is at rest. When shaft 47 is driven it serves to raise or lower head 16 at a comparatively rapid speed. Shaft 31 is driven in one direction. at all times and when the clutch teeth 72 and 70 are engaged serves to drive the head 16 downwardly at a comparatively slow speed. If the head is in an upper position, far enough to bring the drills carried therebyabove the work, with the clutch teeth. 70 and 72 disengaged, the head is stationary, and will remain so until the work of drilling is to be started. This is done by graspinghandle 102 and operating the same to rock the shaft 45. theretime; or slightly before the drive of the shaft .47 is stopped, the rear end of lever 77 has ridden over and against member 83, thereby forcing the upper endof lever forward and e'ngaging the clutch teeth 72 with the teeth 70, thereby causing shaft 31 to -drive the long-sleeve nut 49 on the threaded portion 48 of shaft 47, carrying the head down ward in lts slow feed movement. This is designed to occur just before the drills are to engage the work; and may be regulated by a proper adjustment of the different members 83 and 97. The slow downward feed continues until member 81 engages with the upper inclined face of the lower member Sl whereupon the clutch teeth 70 and 72 are disengaged and all motion of the head stopped. To return the head to upper position for another cycle of drilling operations, the handle 102 is grasped and operated to start shaft 47 in a direction reverse from that which it had at first, the head returning to upper position and automatically stopping when the member 95 engages with the upper member 96. The head will then remain at rest until the cycle of operations is again started by manual operation of the handle 102. wardly extending portions of members 83 and 84 are in different planesso that part 81 may pass the member 83 without action, while lever, 77, being wide enough to engage and be engaged by part 83 only is mere 1y tipped up as it passes member 83 in its upward movement, returning to normal position by gravity as soon as it has passed.

This construction is practical and operative and serves the purposes for which it is designed full The slow feed automatically throws in at the proper place, and if desired, it may be manually controlled and stopped or started at any time through the manual control attached to and operable by rod 90 this from any position at the front of the machine. The quick power traverse of the head is also manually controlled from the front of the machine and automatically the slow feed is to begin. One very important feature of this invention resides in the fact that the drill carrying head is always pulled down by the screw feed, the screw being under tension strain and not subjected to compression strains, the advantages of which are obvious. The invention has been shown and described in connection with a vertically movable head, but is not in any sense limited thereto as the same constructions are available for horizontal drilling machines. In fact the mechanical design may be varied widely without changing the principles of operation or departing from the invention. For instance separate sources of power may be used to drive the shaft 47 and the remainder of the mechanism. Accordingly, I do not wish to be limited to the disclosure made but consider that I am entitled to all forms of structure, other than those specifically disclosed, which come within the scope of the appended claims and do not wish to be limited in any respect other than is necessitated by said claims.

I claim 1. In combination with a support and a It will be noted that the for-- drill carrying head movably mounted thereon, of means for moving said head at a comparatively rapid rate of speed in either direction, means for stopping said rapid speed movement of the head prior to theengagement of drills carried by the head with the work, and .means for moving said head at a comparatively low rate of speed automatically renderedoperative prior to the disengagement of the rapid actuating means and prior to said engagement with the work, substantially as described.

2. In combination with a support and a drill carrying head movably mounted there on, of means for moving said head at a comparatively rapid rate of speed hack and forth, additional means for moving said head in one direction at a comparatively low rate of speed, means for manually controlling the rapid speed travel to stop and start the same, means to automatically stop said rapid speed travel in either direction at predetermined points, and means to automatically render said slow speed means effective at a predetermined point of the movement of the head in one direction prior to the disengagement of the rapid actuating means,

substantially as described.

3. In combination with a support and a drill carrying head mounted to move back and forth on the same, of means for moving said head at a comparatively rapid rate of speed in either direction, means for moving said head in one direction at a compare): tively slow rate of speed, means for automatically stopping the rapid travel of the head in one direction at a predetermined point, means for automatically rendering said slow movement means effective sub stantially at the same time with the stopping of the rapid feed, but slightly in advance of the same and means for automatically stopping the slow movement feed at a predetermined point, substantially as described.

4. In combination, a support, a drill carrying head mounted for back and forththe rapid rate movement, and while the latter is in operation, and means for automatically stopping the slow feed movement when a further predetermined point has been reached, substantially as described.

5. In combination, a support, a drill carrying head mounted to move back and forth on the support, means for moving the head at a comparatively rapid rate of speed in either direction, means for manually rendering said means effective to start movement of'the head in one direction, means to automatically stop said movement at a predetermined point, means for moving the head in the same direction'at a comparatively slow rate of speed and operable either alone or simultaneously with the rapid movement speed of the head, means for automatically rendering said slow movement feed effective immediately prior to the stopping of the rapid movement and while the same is operatmg, means for automatically stopping said slow movement at a predetermined point, means for manually reversing the directionof'movement of the head and conmeeting with said first mentioned rapid movement means, and means for automatically stopping all movement of the head when it reaches its initial starting position, substantially as described.

6. In combination, -a support, a screw threaded shaft mounted lengthwise of the support, reversible means for driving the shaft in either direction, a drill carrying head, gearing connections between said head and screw on the shaft for moving the head back and forth on the support on rotation of the shaft in opposite directions, means for automatically stopping the rotation of the shaft at predetermined points in the travel of the head in either direction, additional means operatively connected with the head formoving it in one direction aftersaid shaft has been stopped, said additional means being operable while the screw threaded shaft is either stationary or rotating, and means for automatically rendering said additional means ineffective when the head reaches a further predetermined point in its travel, substantially 'as described.

7. A construction containing the elements in combination defined in claim 6, combined with means for automatically connecting said additional means with the head to move the same immediately prior to the stopping of the screw" shaft when the head is moving in one, direction of its movement.

8., In combination, an elongated support, a single screw threaded shaft mounted on and lengthwise of the support, an elongated sleeve nut on the shaft, a drill carrying head mounted on the support, connections between the head and said sleeve nut for the either stationary or rotating to thereby move the head at reduced speed of movement beyond the point where the shaft stops operation, and means for automatically disconnectin said additional means from the nut at a further predetermined point in the movement of the head, substantially as described.

9.- A onstruct-ion containing the elements in comblnation defined in 'claim 8, combined with means for automatically connecting said additional driving means with the sleeve nut immediately prior to the disconnection of the driving means for the screw shaft therefrom, substantially as described.

10. A construction containing the elements in combination claimed in claim 8, combined with means for automatically connecting said additional driving means with the; sleeve nut immediately prior to the discon motion of the driving means for the screw shaft therefrom, and means for manually connecting ordisconnecting the driving means for the screw shaft to or from said shaft.

11. In combination, an elongated support,

a single. screw threaded shaft mounted on andlengthwise of the support, an elongated sleeve nut on the shaft, a drill carrying head mounted on the support, connections between the head and said sleeve nut for movthreaded shaft is either stationary or rotating, said mechanism including a clutch for connecting with and disconnecting the second shaft from the'sleeve nut, and means for connecting and disconnecting said clutch, substantially as described.

12. In combination, an elongated support, a screw threaded shaft mounted on and lengthwise of the support, an elongated sleeve nut on the shaft, a drill carrying head mounted on the support, connections between the head and said sleeve nut for moving the head back and forth with ref,

erence to the support on rotation of the shaft, driving means, 'manually operable moving the head along the support on rota-- means for connecting said driving means with the shaft to turn it in either direction, means for automatically disconnecting said driving means from the shaft on movement of the head to a predetermined point in ,either. direction, a second shaft, means for continuously driving it in one direction, a clutch. member splined on the second shaft, a sleeve including a c perating clutch combined with means for automatically moving said first clutch member away from the second clutch member on movement of the head to a further position, substantially as described.

14. A construction containing the elements in combination defined in claim 12, comblned with an operating lever operatively associated with the first clutch member to move the same on the second shaft,.

and means on the support with which said lever engages to move the first clutch member into connection with the second clutch member prior to the stopping of the 'driving of the screw shaft, substantially as de scribed. v V

15. In combination, an elongatedsupport, a screw threaded shaft mounted on and lengthwise of the support, an elongated sleeve nut on the shaft, a drill carrying head mounted on the support, connections between the head and sleeve nut for moving the'head with reference to the support on rotation of the shaft, driving means, manually operable means for connecting said driving means with the shaft to turn it in either direction, means for automatically disconnecting said driving means from the shaft on movement of the head to a predetermined point in either direction, a second shaft, means for continuously driving it in one direction, a clutch member splined on the second shaft, ,a sleeve including a second clutch member loosely mounted on the second shaft, gearing mechanism between said sleeve and the sleeve nut ,for'driving said sleeve nut from the sleeve, and at a reduced speed, a lever connected with the first clutch member and movable with the head, and trip members adjustably mountedrating said clutch members at a further predetermined point in the movement of the.

head, substantially as described.

16. A' construction containing the ele-- ments in combination defined in claim 15, combined with yielding catch means for holding said lever in either of its positions to which it may be moved to thereby hold the clutch members either in engagement or disengaged from each other.

17 In combination, an elongated support, a screw threaded shaft mounted lengthwise thereof, driving means including a revers ible shaft connected to the screw shaft to drive the same, means including a rock shaft located lengthwise of the support for reversing the direction of movement of the screw shaft or for disconnecting the driving means from said shaft, a drill carrying head mounted on the support and carrying said rockshaft, means connecting the screw shaft and head for moving the head on the support on rotation of the shaft, and two separate members on the supportadapted to be engaged with the rock shaft to move the same to thereby disconnect the driving means from the shaft on the attainment of a predetermined position of the head in either direction of its movement, substantially as described.

18. A construction containing the elements in combination defined in claim 17, combined with means for adjustably connecting said two members tothe' support, substantially as described. I

19. In combination, an elongated support, a drillcarrying head movably mounted thereon, means for moving the head in one direction on the support, driving means for said first means, means for manually connecting the driving means with said first means to start movement of the head in one direction, means for automatically disconnecting said driving means to stop movement of the head by the first means at a predetermined point, additional means for moving the head in the same-direction and operable simultaneouslywithone of said.

driving means, driving means therefor, means for connecting said second driving means with said additional means automatically prior to disconnection of the first driving means from the first means, means for automatically disconnecting said second driving means from said additional moving means at a further predetermined point. means for reversing the movement of said first means to carry the head in the opposite direction, said means being manually operable, and means for automatically stopping the movement of the head on attainment of its starting position, substantially as de-' scribed.

In testimony whereof I aflix my signature.

EDGAR W. CLEVELAND, 

